Security Ask the Expert

What changes will need to be made if I switch from film to Digital Radiography (DR)?

Most of the set up and the parameters are similar to those used in film. The main elements that change are the exposure time, which will be reduced dramatically, and the penetration, which will rise considerably. While shooting the X-ray images, there is no need for down range approach in order to shoot, develop or scan the picture.

What is averaging and how can it improve the X-ray image quality?

Averaging is a technique that combines at least 2-4 images by averaging their values at every pixel. The result is a “cleaner” image due to a reduction of noise (which is random) and an increased Signal to Noise (SNR) level.

I am encountering problems when trying to implement Stitching. How can I improve the process?

There are several basic guidelines regarding stitching which must be complied with in order to improve the probability of accurate stitching. There needs to be sufficient overlap between the pictures so that the software can determine where it should stitch the images (the higher the homogeneity of the object, the more overlap required). When X-raying a given object, it is important to maintain a fixed distance, exposure and angle between the object and the panel. The X-ray source should be positioned perpendicular to the panel.

What is the main advantage of using a DR system as compared to CR (Computed Radiography) Plates?

With a DR portable X-ray system, the bomb tech or inspector can set up the system one time with a single approach to the item being inspected and then take multiple X-ray images. No scanning, developing or any other processing is required. The digital imagers are more durable and react much better in field conditions than CR systems, which were designed specifically for lab use.

Better penetration is also achieved when using Vidisco DR systems with Golden portable X-ray sources in comparison to CR systems.

How quickly can the Vidisco X-ray system be set up and operational?

An experienced user can set up any Vidisco portable digital X-ray system in less than 2 minutes. Following the short set up process, it is possible to immediately acquire endless numbers of images using the internal battery or external power (AC).

How can I use Dual Energy (organic detection) in the field and why is it so important?

The organic detection feature (originally developed for airport X-ray detections systems) was enhanced and developed by Vidisco for field use in 2008, utilizing the Golden battery-operated X-ray source and the Vidisco DR flat panel systems. By simply snapping Vidisco’s unique XR-DE Plus Dual Energy module on to any Golden Source and activating the Dual Energy feature in Vidisco’s Xbit software, the user can detect organic substances such as various explosives, drugs and contraband. The process is automatic and highly effective for IED detection.

This extra element of detection is important because it provides another level of confirmation to the user with regard to the item being inspected. Not only will the user acquire a top-quality X-ray image, he will also receive organic/inorganic indication with orange coloring suspicious materials such explosives or drugs in the X-ray image.

What makes the Vidisco flat panels so unique?

Vidisco’s flat panels offer a unique synergy of capabilities unavailable in similar products on the market.

Vidisco’s flat panel systems come equipped with the smart Imager Control Unit (ICU), which controls the DDA in the field. This enables the provision of hours of battery operation, sending power and data down a single thin cable. The ICU also contains built-in wireless devices (for communication & control of the X-ray source). Comparable medical DDAs currently offered on the market cannot survive the harsh environment outside the sterile labs. They lack the required sensitivity and will limit the system’s penetration capabilities.

All Vidisco flat panels offer several advantages over other technologies being used today in the field for EOD inspection. The most important benefit is the fact that Vidisco flat panels have been adapted for all-weather operation and are successfully deployed worldwide in a variety of theaters. Vidisco flat panels also have the ability to work for hours with various X-ray sources, X-raying multiple threats, without ever breaking down. These DDAs offer the highest resolution and penetration capabilities (50-80mm of steel!!) in the market today. And finally - security represents a top priority when operating a Vidisco imaging system. The combined utilization of Golden X-ray sources and Vidisco’s sensitive flat panel detectors enables the use of smaller X-ray doses and maximum safety for the surrounding environment.

Will a new Vidisco system support an old one? Can I use it as a backup system?

Any new Vidisco digital X-ray system purchased today supports, operates and controls the older generation FoXrayII and FoXRayzor, for example, and other imagers. The user can take the newly acquired system, hook up the older imager DDA (using a special adapter kit supplied with the system), and X-ray directly through the new system. The huge advantage is that you do not need to dispose of the older system because you can continue to use it alongside the new one.